EN AC-44100 (44100-F, AISi12(b)) Cast Aluminum
EN AC-44100 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 44100 is the EN numeric designation for this material. AISi12(b) is the EN chemical designation.
It has a fairly low density among Euronorm (EN) cast aluminums. In addition, it has a moderately low tensile strength and a moderately high ductility.
The graph bars on the material properties cards below compare EN AC-44100 aluminum to: Euronorm (EN) cast aluminums (top), all aluminum alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
59
Elastic (Young's, Tensile) Modulus
72 GPa 10 x 106 psi
Elongation at Break
4.9 %
Fatigue Strength
64 MPa 9.2 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
27 GPa 3.9 x 106 psi
Tensile Strength: Ultimate (UTS)
180 MPa 25 x 103 psi
Tensile Strength: Yield (Proof)
87 MPa 13 x 103 psi
Thermal Properties
Latent Heat of Fusion
570 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
590 °C 1090 °F
Melting Onset (Solidus)
580 °C 1080 °F
Specific Heat Capacity
900 J/kg-K 0.22 BTU/lb-°F
Thermal Conductivity
130 W/m-K 77 BTU/h-ft-°F
Thermal Expansion
21 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
34 % IACS
Electrical Conductivity: Equal Weight (Specific)
120 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.5 g/cm3 160 lb/ft3
Embodied Carbon
7.7 kg CO2/kg material
Embodied Energy
140 MJ/kg 62 x 103 BTU/lb
Embodied Water
1050 L/kg 130 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
7.1 MJ/m3
Resilience: Unit (Modulus of Resilience)
53 kJ/m3
Stiffness to Weight: Axial
16 points
Stiffness to Weight: Bending
55 points
Strength to Weight: Axial
19 points
Strength to Weight: Bending
27 points
Thermal Diffusivity
58 mm2/s
Thermal Shock Resistance
8.2 points
Alloy Composition
Among cast aluminum alloys, the composition of EN AC-44100 aluminum is notable for containing a comparatively high amount of silicon (Si) and including lead (Pb). Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect. Lead is used to improve machinability at the cost of toxicity and a decrease in weldability.
| Al | 84.4 to 89.5 | |
| Si | 10.5 to 13.5 | |
| Fe | 0 to 0.65 | |
| Mn | 0 to 0.55 | |
| Ti | 0 to 0.2 | |
| Zn | 0 to 0.15 | |
| Cu | 0 to 0.15 | |
| Ni | 0 to 0.1 | |
| Pb | 0 to 0.1 | |
| Mg | 0 to 0.1 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 1706: Aluminium and aluminium alloys. Castings. Chemical composition and mechanical properties
Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003